Remember a customer bringing his MGB and a three piece clutch kit and asked me to fit it which I did. The car still slipped in high gears so he brought it back with another kit and asked me to change it. Exactly the same outcome.He was rantings and raving about the quality of the parts,I pointed out that there was nothing wrong with the original clutch so he decided to let me test drive it(for the first time) I must add. He wrongly diagnosed the main clutch when all along it was the overdrive clutch.
Trying to save a few pounds cost him dearly.